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3 years ago

7

Can any one help with this question?

1 answer:

Allushta [10]3 years ago

7 0

Answer:

Y=6X+51

Step-by-step explanation:

Mark me as brainliest if this helps!

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Solve the following system of equations<br>2x – 3y = 6<br>4x+2y=4

FinnZ [79.3K]

Answer:

$\boxed{(\frac{3}{2} ,-1)}$

Step-by-step explanation:

$\left \{ {{2x-3y=6} \atop {4x+2y=4}} \right.$

It seems this system of equations would be solved easier using the elimination method (the x and y values are lined up).

Multiply everything in the first equation by -2 (we want the 4x to be able to cancel out with a -4x).

$2x-3y=6 \rightarrow -4x+6y=-12$

Now line up the equations (they are already lined up - convenient) and add them from top to bottom.

$\left \{ {{-4x+6y=-12} \atop {4x+2y=4}} \right.$

The -4x and 4x are opposites, so they cancel out.

Adding 6y and 2y gives you 8y, and adding -12 and 4 gives you -8.

$8y=-8$

Divide both sides by 8.

$y=-1$

Since you have the y-value you can substitute this in to the second (or first equation, it doesn't necessarily matter) equation.

$4x +2(-1)=4$

Simplify.

$4x -2=4$

Add 2 to both sides.

$4x=6$

Divide both sides by 4.

$x=\frac{6}{4} \rightarrow\frac{3}{2}$

The final answer is $x=\frac{3}{2} ,~y=-1$ .

$(\frac{3}{2} ,-1)$

5 0

3 years ago

After school Marcy can start walking dogs by 3:15pm she wants to be dont walking by 6:00 in time for dinner if she does one dog

evablogger [386]

She can walk 3 dogs before dinner

5 0

3 years ago

Read 2 more answers

Please help me and please explain the answer:))

hodyreva [135]

Answer:

3rd one

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Please its very urgent :( Name five whole numbers that can be expressed as the difference of two perfect squares. Show the math!

Tatiana [17]

Answer:

9, 17, 3, 1600, 11

Step-by-step explanation:

Difference of two perfect squares:

$a^2-b^2=(a-b)(a+b)$

It seems that you want some

$x=a^2-b^2, x \in \mathbb{Z}_{\ge 0}$

Note: there's no official symbol for the set of whole numbers, I've already seem $\mathbb{W}, \mathbb{Z}^+$ , as well.

$5^2-4^2=25-16=9$

There are infinitely many numbers that can satisfy the condition given.

The only condition is that $a\geq b$ , once we are considering whole numbers and not integers.

$x_{1}=5^2-4^2=25-16=9$

$x_{2}=9^2-8^2=81-64=17$

$x_{3}=2^2-1^2=4-1=3$

$x_{4}=50^2-30^2=2500-900=1600$

$x_{5}=6^2-5^2=36-25=11$

3 0

3 years ago

The sum of two numbers is 57 and the difference is 7. What are the numbers?

Andrej [43]

Answer:

32 and 25

Step-by-step explanation:

7 0

2 years ago